Also participating, so to speak, was Bell's then-unborn daughter Lincoln, who helped turn the sexy scenes into a group affair, Bell told Conan O'Brien on his Conan show.

The new Veronica Marsfilm star then went on to say that at her 7-month bump got way in the way.

Brody "affectionately refers to our sex scenes as our threesomes because my belly was just on top," Bell, 33, told O'Brien, adding that the actor was a good sport as she finessed her being pregnant as they cavorted in the sack.

Bell hopes baby Lincoln, who turns 1 in March, will one day come to appreciate her work, which included shooting scenes of making a sex video on the show where Mom's growing tummy was cropped out to make it appear realistic.

"And now I can forever look at my daughter and say, 'Oh, you were pregnant for that!' " said Bell, who, later appearing on Chelsea Lately told host Chelsea Handler that she hopes her daughter grows up to view the lovemaking as healthy.

"My guess is if she is like the other 5 billion people on the planet, she's going to grow up and enjoy sex," Bell said. "I'm not going to be shocked by that."